Key structure

A key structure, comprising:

• a keycap;
• a bottom plate, comprising a body and a plurality of protrusions, wherein the body has a plurality of openings, and the protrusions protrude from a first surface of the body and are disposed around the openings, wherein at least one of the protrusions has at least two sections having different heights;
• a supporting element, disposed on the bottom plate;
• a backlight module, disposed on a second surface of the body, wherein the first surface and the second surface are opposite surfaces;
• and
• a thin film circuit board, disposed on the first surface of the body and located between the keycap and the bottom plate,
• wherein the protrusions are located within an orthographic projection range of the keycap, and the protrusions do not contact the supporting element.

A key structure, comprising:

• a keycap;
• a bottom plate, comprising a body and a protrusion, wherein the body has a first opening and a second opening, and the protrusion protrudes from an edge of the first opening;
• a light source, disposed at a position corresponding to the second opening;
• a supporting element, disposed on the bottom plate;
• and
• a thin film circuit board, disposed on the bottom plate,
• wherein the protrusion does not contact the supporting element.